#0  ast_closestream (f=0x81d8288) at file.c:728
728  if (f->vfs) {
(gdb) bt
#0  ast_closestream (f=0x81d8288) at file.c:728
#1  0x0805fba1 in ast_hangup (chan=0x8170828) at channel.c:1332
#2  0x08082af0 in __ast_pbx_run (c=Cannot access memory at address 0x151
) at pbx.c:2296
Cannot access memory at address 0x1
(gdb) bt full
#0  ast_closestream (f=0x81d8288) at file.c:728
 f = (struct ast_filestream *) 0x81d8288
 cmd = 0x0
 size = 0
#1  0x0805fba1 in ast_hangup (chan=0x8170828) at channel.c:1332
 chan = (struct ast_channel *) 0x8170828
 res = 0
#2  0x08082af0 in __ast_pbx_run (c=Cannot access memory at address 0x151
) at pbx.c:2296
 c = (struct ast_channel *) 0x8170828
 digit = Cannot access memory at address 0x1d
(gdb) thread apply all bt

Thread 1 (process 31925):
#0  ast_closestream (f=0x81d8288) at file.c:728
#1  0x0805fba1 in ast_hangup (chan=0x8170828) at channel.c:1332
#2  0x08082af0 in __ast_pbx_run (c=Cannot access memory at address 0x151
) at pbx.c:2296
Cannot access memory at address 0x1
(gdb)